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Licensing and You 
Chris Tankersley 
Nomad PHP – September 2014
2 
Who Am I? 
● Chris Tankersley 
● A PHP Developer for 10 Years 
● Been Interested in 
Copyright/Licensing for a long 
ti...
3 
First, Some Housekeeping
4 
First
5 
IANAL
6
7 
Second
8
9
10 
Third
11
12 
All Hail The One True Editor
13
14 
And Fourth
15 
This Can Be 
Complicated
16 
</housekeeping>
17 
Licenses
18 
Licenses
19 
A Quick Detour - Copyright
20 
What is Copyright? 
“Copyright is a legal concept, enacted by most governments, that grants the 
creator of an origina...
21 
The Employment Trap
22 
Licenses
23 
What Is a License?
24 
Many Different Kinds
25 
Propriety Software Licensing
26
Getting Source != Open Source 
27
28 
Open Source Licensing
29 
Freedom (Mostly)
30 
Freedom (Mostly)
31 
Copyleft Licenses 
A type of license that makes 
the software free and requires 
all modifications and 
extensions to ...
32 
Examples 
● GNU GPL 
● Creative Commons ShareAlike 
● Public Domain
33 
Non-Copyleft Licenses 
When the author gives 
permission to redistribute and 
modify, but there are other 
restriction...
34 
Examples 
● BSD License 
● MIT License 
● Pretty much anything not 
GPL(-derived)
35 
Which To Choose?
36 
It Depends 
● Copyleft makes sure your 
code is always stays free 
● Non-Copyleft is more 
developer friendly
37 
Another Quick Detour 
Creative Commons should not be used for 
software, only for graphics/text
38 
No Time For Questions :( 
● @dragonmantank 
● chris@ctankersley.com 
● dragonmantank (freenode)
39 
Thanks!
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Licensing and You

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A very quick overview of licensing and copyright for developers.

This is a lightning talk given for NomadPHP on September 18, 2014

Published in: Technology
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Licensing and You

  1. 1. Licensing and You Chris Tankersley Nomad PHP – September 2014
  2. 2. 2 Who Am I? ● Chris Tankersley ● A PHP Developer for 10 Years ● Been Interested in Copyright/Licensing for a long time
  3. 3. 3 First, Some Housekeeping
  4. 4. 4 First
  5. 5. 5 IANAL
  6. 6. 6
  7. 7. 7 Second
  8. 8. 8
  9. 9. 9
  10. 10. 10 Third
  11. 11. 11
  12. 12. 12 All Hail The One True Editor
  13. 13. 13
  14. 14. 14 And Fourth
  15. 15. 15 This Can Be Complicated
  16. 16. 16 </housekeeping>
  17. 17. 17 Licenses
  18. 18. 18 Licenses
  19. 19. 19 A Quick Detour - Copyright
  20. 20. 20 What is Copyright? “Copyright is a legal concept, enacted by most governments, that grants the creator of an original work exclusive rights to its use and distribution, usually for a limited time, with the intention of enabling the creator of intellectual wealth (e.g. the photographer of a photograph or the author of a book) to receive compensation for their work and be able to financially support themselves. Copyright is a form of intellectual property (as patents, trademarks and trade secrets are), applicable to any expressible form of an idea or information that is substantive and discrete.[1] It is often shared, then percentage holders are commonly called rightsholders: legally, contractually and in associated "rights" business functions.[citation needed] Generally rightsholders have "the right to copy", but also the right to be credited for the work, to determine who may adapt the work to other forms, who may perform the work, who may financially benefit from it, and other related rights.”
  21. 21. 21 The Employment Trap
  22. 22. 22 Licenses
  23. 23. 23 What Is a License?
  24. 24. 24 Many Different Kinds
  25. 25. 25 Propriety Software Licensing
  26. 26. 26
  27. 27. Getting Source != Open Source 27
  28. 28. 28 Open Source Licensing
  29. 29. 29 Freedom (Mostly)
  30. 30. 30 Freedom (Mostly)
  31. 31. 31 Copyleft Licenses A type of license that makes the software free and requires all modifications and extensions to be free as well
  32. 32. 32 Examples ● GNU GPL ● Creative Commons ShareAlike ● Public Domain
  33. 33. 33 Non-Copyleft Licenses When the author gives permission to redistribute and modify, but there are other restrictions
  34. 34. 34 Examples ● BSD License ● MIT License ● Pretty much anything not GPL(-derived)
  35. 35. 35 Which To Choose?
  36. 36. 36 It Depends ● Copyleft makes sure your code is always stays free ● Non-Copyleft is more developer friendly
  37. 37. 37 Another Quick Detour Creative Commons should not be used for software, only for graphics/text
  38. 38. 38 No Time For Questions :( ● @dragonmantank ● chris@ctankersley.com ● dragonmantank (freenode)
  39. 39. 39 Thanks!

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